25856585 has 4 divisors (see below), whose sum is σ = 31027908. Its totient is φ = 20685264.

The previous prime is 25856569. The next prime is 25856629. The reversal of 25856585 is 58565852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7946761 + 17909824 = 2819^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 25856585 - 2⁴ = 25856569 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2585654 + ... + 2585663.

It is an arithmetic number, because the mean of its divisors is an integer number (7756977).

Almost surely, 2^25856585 is an apocalyptic number.

It is an amenable number.

25856585 is a deficient number, since it is larger than the sum of its proper divisors (5171323).

25856585 is an equidigital number, since it uses as much as digits as its factorization.

25856585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171322.

The product of its digits is 480000, while the sum is 44.

The square root of 25856585 is about 5084.9370694238. The cubic root of 25856585 is about 295.7039017657.

The spelling of 25856585 in words is "twenty-five million, eight hundred fifty-six thousand, five hundred eighty-five".